I have just started using Office 365 and am trying to open some existing Office 2016 notebooks. I get to choose notebooks to open, click on the one I want (on this computer) and choose Open. I pick my cloud account then Upload. It shows Opening for a bit, then I get an error: Microsoft OneNote Something went wrong and we can't do what you asked. We're sorry Error Code: 0x80004005.
I also tried creating a new notebook and I get the error: Microsoft OneNote We were unable to create your notebook. Check your internet connection and try again.